U.S. patent application number 13/242270 was filed with the patent office on 2012-05-10 for linear vibrator.
This patent application is currently assigned to LG Innotek Co., Ltd.. Invention is credited to KAPJIN LEE.
Application Number | 20120112565 13/242270 |
Document ID | / |
Family ID | 46018936 |
Filed Date | 2012-05-10 |
United States Patent
Application |
20120112565 |
Kind Code |
A1 |
LEE; KAPJIN |
May 10, 2012 |
LINEAR VIBRATOR
Abstract
Disclosed is a linear vibrator, the linear vibrator including: a
bottom case including a floor plate and first and second elastic
units integrally formed with the floor plate, and mutually and
oppositely bent from both distal ends facing the floor plate; a
stator including a circuit substrate arranged on the floor plate
and a coil block electrically connected to the circuit substrate; a
trembler including a magnet discretely facing the coil block and a
weight securing the magnet; and an upper case coupled to the bottom
case to accommodate the stator and the trembler, wherein both
lateral surfaces of the trembler facing the first and second
elastic units are elastically supported by the first and second
elastic units.
Inventors: |
LEE; KAPJIN; (Seoul,
KR) |
Assignee: |
LG Innotek Co., Ltd.
Seoul
KR
|
Family ID: |
46018936 |
Appl. No.: |
13/242270 |
Filed: |
September 23, 2011 |
Current U.S.
Class: |
310/20 |
Current CPC
Class: |
B06B 1/045 20130101;
H02K 33/16 20130101 |
Class at
Publication: |
310/20 |
International
Class: |
H02K 33/00 20060101
H02K033/00 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 10, 2010 |
KR |
10-2010-0111729 |
Nov 10, 2010 |
KR |
10-2010-0111730 |
Claims
1. A linear vibrator, comprising: a bottom case including a floor
plate and first and second elastic units integrally formed with the
floor plate, and mutually and oppositely bent from both distal ends
facing the floor plate; a stator including a circuit substrate
arranged on the floor plate and a coil block electrically connected
to the circuit substrate; a trembler including a magnet discretely
facing the coil block and a weight securing the magnet; and an
upper case coupled to the bottom case to accommodate the stator and
the trembler, wherein both lateral surfaces of the trembler facing
the first and second elastic units are elastically supported by the
first and second elastic units.
2. The linear vibrator of claim 1, wherein the trembler includes a
yoke inhibiting magnetic flux generated by the magnet from
leaking.
3. The linear vibrator of claim 2, wherein the yoke covers an upper
surface of the weight and both lateral surfaces of weight facing
the first and second elastic units.
4. The linear vibrator of claim 2, wherein both lateral surfaces of
yoke are respectively welded to the first and second elastic
units.
5. The linear vibrator of claim 1, wherein both lateral surfaces of
trembler are respectively coupled to the first and second elastic
units.
6. The linear vibrator of claim 1, wherein width of the trembler is
smaller than a gap between the mutually facing the first and second
elastic units.
7. The linear vibrator of claim 1, wherein the first and second
elastic units include fixtures mutually and oppositely bent from
both distal ends, and a zigzagged leaf spring unit connected at
both distal ends to each fixture and vertically formed relative to
the floor plate.
8. The linear vibrator of claim 7, wherein a center unit of the
leaf spring unit at the first and second elastic units is coupled
to the trembler, and both portions of the center unit at the leaf
spring is discrete from the trembler.
9. The linear vibrator of claim 7, wherein the leaf spring unit
includes a plurality of spring units mutually and vertically
arranged in parallel relative to the floor plate, each connected in
series.
10. The linear vibrator of claim 7, wherein a center spring unit in
the plurality of spring units is coupled to a lateral surface of
the trembler.
11. The linear vibrator of claim 10, wherein the center spring unit
in the plurality of spring units is welded to a lateral surface of
the trembler.
12. The linear vibrator of claim 10, wherein at least one coil
block is provided.
13. A linear vibrator, comprising: a bottom case including a floor
plate; a stator including a circuit substrate arranged on the floor
plate and a coil block arranged on the circuit substrate; a
trembler including a magnet discretely opposite to the coil block
and a weight securing the magnet; and an upper case including an
upper plate coupled to the bottom case and first and second elastic
units integrally formed with the upper plate and mutually
oppositely bent from both edges facing the upper plate, wherein
both lateral surfaces of the trembler are respectively supported by
the first and second elastic units integrally formed with the upper
case.
14. The linear vibrator of claim 13, wherein the trembler includes
a yoke inhibiting magnetic flux generated by the magnet from
leaking.
15. The linear vibrator of claim 14, wherein the yoke covers an
upper surface of the weight and both lateral surfaces of weight
facing the first and second elastic units.
16. The linear vibrator of claim 14, wherein both lateral surfaces
of yoke are respectively welded to the first and second elastic
units.
17. The linear vibrator of claim 11, wherein both lateral surfaces
of trembler are respectively coupled to the first and second
elastic units.
18. The linear vibrator of claim 13, wherein width of the trembler
is smaller than a gap between the mutually facing the first and
second elastic units.
19. The linear vibrator of claim 13, wherein a center unit of the
first and second elastic units is coupled to the trembler, and both
distal ends arranged at both sides of the center unit at the first
and second elastic units are discrete from the trembler.
20. The linear vibrator of claim 13, wherein at least one coil
block is provided.
21. The linear vibrator of claim 13, wherein the bottom case
includes a protective plate bent from the bottom case to cover the
first and second elastic units.
22. The linear vibrator of claim 13, wherein the first and second
elastic units include fixtures mutually and oppositely bent from
the upper plate, and a zigzagged leaf spring unit connected at both
distal ends to each fixture and vertically formed relative to the
floor plate.
23. The linear vibrator of claim 22, wherein the leaf spring unit
includes a plurality of spring units mutually and vertically
arranged in parallel relative to the floor plate, each connected in
series.
24. The linear vibrator of claim 22, wherein a center spring unit
in the plurality of spring units is coupled to a lateral surface of
the trembler.
25. The linear vibrator of claim 22, wherein the center spring unit
in the plurality of spring units is welded to each lateral surface
of the trembler.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims the benefit under 35 U.S.C.
.sctn.119 of Korean Patent Application Nos. 10-2010-0111729, filed.
Nov. 10, 2010, and 10-2010-0111730, filed Nov. 10, 2010, which are
hereby incorporated by reference in their entirety.
BACKGROUND OF THE DISCLOSURE
[0002] 1. Field of the Disclosure
[0003] The present disclosure relates to a linear vibrator.
[0004] 2. Description of the Related Art
[0005] A linear vibrator is applied to various electronic devices,
such as mobile phones, game players, mobile game players, game
controllers and joy sticks, and electric tooth brushes, to generate
vibration.
[0006] The linear vibrator generally includes a case including a
bottom case and an upper case, a coil secured to the bottom case, a
magnet arranged about or inside the coil, a weight securing the
magnet, and a spring such as a leaf spring or a coil spring
reciprocating the weight and the magnet from a upper case direction
to a bottom case direction. The conventional linear vibrator is a
vertical linear vibrator in which the magnet vertically
reciprocates relative to the coil.
[0007] However, in the vertical linear vibrator that vertically
reciprocates the magnet and the magnet inside the case to generate
vibration, a space for vibrating the spring is needed because the
spring is vertically driven to generate the vibration, whereby
thickness and volume increase to disadvantageously increase
thickness and volume of electronic products and living products in
which the vertical linear vibrator is mounted.
BRIEF SUMMARY
[0008] The present disclosure is to provide a linear vibrator
configured to reduce both thickness and superficial area by
horizontally reciprocating a magnet and a weight inside a case to
generate vibration, whereby vibration power can be increased to
reduce an overall size of the vibrator.
[0009] Technical subjects to be solved by the present disclosure
are not restricted to the above-mentioned description, and any
other technical problems not mentioned so far will be clearly
appreciated from the following description by those skilled in the
art.
[0010] In one general broad aspect of the present disclosure, there
is provided a linear vibrator, the linear vibrator comprising: a
bottom case including a floor plate and first and second elastic
units integrally formed with the floor plate, and mutually and
oppositely bent from both distal ends facing the floor plate; a
stator including a circuit substrate arranged on the floor plate
and a coil block electrically connected to the circuit substrate; a
trembler including a magnet discretely facing the coil block and a
weight securing the magnet; and an upper case coupled to the bottom
case to accommodate the stator and the trembler, wherein both
lateral surfaces of the trembler facing the first and second
elastic units are elastically supported by the first and second
elastic units.
[0011] In another general broad aspect of the present disclosure,
there is provided a linear vibrator, the vibrator comprising: a
bottom case including a floor plate; a stator including a circuit
substrate arranged on the floor plate and a coil block arranged on
the circuit substrate; a trembler including a magnet discretely
opposite to the coil block and a weight securing the magnet; and an
upper case including an upper plate coupled to the bottom case and
first and second elastic units integrally formed with the upper
plate and mutually oppositely bent from both edges facing the upper
plate, wherein both lateral surfaces of the trembler are
respectively supported by the first and second elastic units
integrally formed with the upper case.
[0012] Additional advantages, objects, and features of the
disclosure will be set forth in part in the description which
follows and in part will become apparent to those having ordinary
skill in the art upon examination of the following or may be
learned from practice of the disclosure. The objectives and other
advantages of the disclosure may be realized and attained by the
structure particularly pointed out in the written description and
claims hereof as well as the appended drawings.
[0013] It is to be understood that both the foregoing general
description and the following detailed description of the present
disclosure are exemplary and explanatory and are intended to
provide further explanation of the disclosure as claimed.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] FIG. 1 is an exploded perspective view of a linear vibrator
according to a first exemplary embodiment of the present
disclosure;
[0015] FIG. 2 is a front view of a first elastic unit of FIG.
1;
[0016] FIG. 3 is a front view of a second elastic unit of FIG.
1;
[0017] FIG. 4 is a schematic assembled cross-sectional view of a
liner vibrator of FIG. 1;
[0018] FIG. 5 is a plane view of a linear vibrator except for an
upper case of FIG. 1;
[0019] FIGS. 6 and 7 are perspective views illustrating a trembling
process of a trembler by a first elastic unit according to a first
exemplary embodiment of the present disclosure; and
[0020] FIG. 8 is a cross-sectional view illustrating a linear
vibrator according to a second exemplary embodiment of the present
disclosure.
DETAILED DESCRIPTION
[0021] Hereinafter, exemplary embodiments of the present disclosure
are described in detail with reference to the accompanying
drawings. In the drawings, sizes or shapes of constituent elements
may be exaggerated for clarity and convenience.
[0022] Particular terms may be defined to describe the disclosure
in the best mode as known by the inventors. Accordingly, the
meaning of specific terms or words used in the specification and
the claims should not be limited to the literal or commonly
employed sense, but should be construed in accordance with the
spirit and scope of the disclosure. The definitions of these terms
therefore may be determined based on the contents throughout the
specification.
[0023] In the following description and/or claims, the terms
"comprise" and "include," along with their derivatives, may be used
and are intended as synonyms for each other. Furthermore, the terms
"including", "includes", "having", "has", "with", or variants
thereof are used in the detailed description and/or the claims to
denote non-exhaustive inclusion in a manner similar to the term
"comprising".
[0024] Words such as "thereafter," "then," "next," etc. are not
intended to limit the order of the processes; these words are
simply used to guide the reader through the description of the
methods. The terms "first," "second," and the like, herein do not
denote any order, quantity, or importance, but rather are used to
distinguish one element from another, and the terms "a" and "an"
herein do not denote a limitation of quantity, but rather denote
the presence of at least one of the referenced item. As may be used
herein, the terms "substantially" and "approximately" provide an
industry-accepted tolerance for its corresponding term and/or
relativity between items.
First Exemplary Embodiment
[0025] FIG. 1 is an exploded perspective view of a linear vibrator
according to a first exemplary embodiment of the present
disclosure, FIG. 2 is a front view of a first elastic unit of FIG.
1, FIG. 3 is a front view of a second elastic unit of FIG. 1, FIG.
4 is a schematic assembled cross-sectional view of a liner vibrator
of FIG. 1, and FIG. 5 is a plane view of a linear vibrator except
for an upper case of FIG. 1.
[0026] Referring to FIGS. 1 to 5, a linear vibrator (600) includes
a bottom case (100), a stator (200), a trembler (300) and an upper
case (400).
[0027] The bottom case (100) may be formed by processing a metal
plate, for example. The bottom case (100) includes a floor plate
(110), a first elastic unit (120) and a second elastic unit (130).
In the embodiment of the present disclosure, the floor plate (110),
the first elastic unit (120) and the second elastic unit (130) may
be integrally formed.
[0028] The floor plate (110) is formed in the shape of a plate. In
the embodiment of the present disclosure, the floor plate (110) may
take the shape of a rectangle, and be centrally formed with an
opening. Both edges opposite to the floor plate (110) are defined
as a first edge (112) and a second edge (114). A portion that is
interfered or expected to be interfered by the first and second
elastic units (120, 130, described later) on the floor plate (110)
adjacent to the first and second edges (112, 114) is removed from
the floor plate to form an opening.
[0029] The first elastic unit (120) is bent from the first edge of
the floor plate (110), and the first elastic unit (120) and the
floor plate (110) are substantially arranged in a vertical method.
The first elastic unit (120) includes a first leaf spring unit
(124) arranged between a pair of first fixtures (122a, 122b: 122)
and a pair of first fixtures (122a, 122b).
[0030] Each of the first fixtures (122a, 122b) serve to fix the
first leaf spring unit (124), and takes the shape of a post at both
sides of the first edge (112) of the floor plate (110).
[0031] The first leaf spring unit (124) includes a first spring
unit (124a), a second spring unit (124b) and a third spring unit
(124c). Each of the first spring unit (124a), the second spring
unit (124b) and the third spring unit (124c) is arranged along a
vertical direction (V) relative to a direction (P) parallel to an
upper surface of the floor plate (110), and discrete in parallel
from the other at a same predetermined space.
[0032] A distal end of the first spring unit (124a) is connected to
one (122a) of the first fixtures (122a, 122b), and a distal end of
the third spring unit (124c) is connected to the other first
fixture (122b) of the first fixtures (122a, 122b).
[0033] The other distal end opposite to the distal end of the first
spring unit (124a) is curvedly connected to a distal end of the
second spring unit (124b), and the other distal end opposite to the
distal end of the third spring unit (124c) is curvedly connected to
the other distal end opposite to the distal end of the second
spring unit (124b).
[0034] That is, in the first embodiment of the present disclosure,
the first, second and third spring units (124a, 124b, 124c) are
zigzagged, the first fixtures (122a, 122b) and the first, second
and third spring units (124a, 124b, 124c) are integrally
formed.
[0035] In an alternative description, the first spring unit (124a)
connected to any one of the first fixtures (122a) is connected to
the second spring unit (124b) by turning 180 degrees, the second
spring unit (124b) is connected to the third spring unit (124c) by
turning 180 degrees, and the third spring unit (124c) is connected
to another first fixture (122b).
[0036] In the first embodiment of the present disclosure, the
first, second and third spring units (124a, 124b, 124c) are zigzag
formed in series, a distal end of the first spring unit (124a) is
connected to any one of the first fixtures (122a), and the third
spring unit (124c) is connected to any one remaining fixture
(122b).
[0037] Referring to FIGS. 1 and 3, the second elastic unit (130) is
bent from the second edge (114) of the floor plate (110), the
second elastic unit (130) is substantially vertical to the floor
plate (110), and the second elastic unit (130) is arranged opposite
to the first elastic unit (120). The second elastic unit (130)
includes second fixtures (132a, 132b: 132) and second leaf spring
unit (134).
[0038] Each of the second fixtures (132a, 132b) serves to fix the
second leaf spring unit (134) and is formed in the shape of a post
at both sides of the second edge (114) of the floor plate (110).
The second leaf spring unit (134) includes a fourth spring unit
(134a), a fifth spring unit (134b) and a six spring unit
(134c).
[0039] The fourth, fifth and sixth spring units (134a, 134b, 134c)
are arranged to a vertical direction (V) relative to a direction
(P) parallel to an upper surface of the floor plate (11.0) and
discrete in parallel each at a same predetermined space.
[0040] A distal end of the fourth spring unit (134a) is connected
to one (132a) of the second fixtures (132a, 132b), and a distal end
of the sixth spring unit (134c) is connected to the other second
fixture (132b) of the second fixtures (132a, 132b).
[0041] The other distal end opposite to the distal end of the
fourth spring unit (134a) is curvedly connected to a distal end of
the fifth spring unit (134b), and the other distal end opposite to
the distal end of the sixth spring unit (134e) is curvedly
connected to the other distal end opposite to the distal end of the
fifth spring unit (134b).
[0042] That is, in the first embodiment of the present disclosure,
the fourth, fifth and sixth spring units (134a, 134b, 134c) are
zigzag arranged, the second fixtures (132a, 132b) and the fourth,
fifth and sixth spring units (134a, 134b, 134c) are integrally
formed.
[0043] In an alternative description, the fourth spring unit (134a)
connected to any one of the second fixtures (132a) is connected to
the fifth spring unit (134b) by turning 180 degrees, the fifth
spring unit (134b) is connected to the sixth spring unit (134c) by
turning 180 degrees, and the sixth spring unit (134c) is connected
to another remaining second fixture (132b).
[0044] In the first embodiment of the present disclosure, the
fourth, fifth and sixth spring units (134a, 134b, 134c) are zigzag
shaped formed is series, a distal end of the fourth spring unit
(134a) is connected to any one of the second fixtures (132a), and
the sixth spring unit (134c) is connected to any one remaining
fixture (132b).
[0045] In the first embodiment of the present disclosure, the floor
plate (110) of the bottom case (100) and the first and second
elastic units (120, 130) may be formed at one time by punching a
metal plate and a pressing process capable of bending the metal
plate.
[0046] The stator (200) is arranged on an upper surface of the
floor plate (110) of the bottom case (100), and includes a circuit
substrate (210) and a coil block (220).
[0047] The circuit substrate (210) is arranged on the upper surface
of the floor plate (110), and a bottom surface of the circuit
substrate (210) corresponding to an opening formed at the floor
plate (110) may be arranged with a connection terminal electrically
connected to an outside circuit substrate.
[0048] The coil block (220) is arranged on an upper surface
opposite to the bottom surface of the circuit substrate (210), and
one or two coil blocks (220) may be preferably arranged on the
upper surface of the circuit substrate (210). Each of the coil
blocks (220) is electrically connected to a circuit substrate
(210).
[0049] The coil block (210) is formed by winding an insulated wire
using an insulation resin, and formed therein with a
rectangle-shaped long narrow width of opening.
[0050] The trembler includes a magnet (310) and a weight (320). The
trembler may further include a yoke (330).
[0051] The magnet (310) is arranged on the upper surface of the
coil blocks (220). The magnet (310) is magnetically formed with
alternatively different polarities for generating an attractive
force and a repulsive force by a magnetic flux generated by the
coil blocks (220). In a case two coil blocks (220) are arranged on
the upper surface of the circuit substrate (210), the magnet (310)
is alternatively formed with four poles of a N pole-S pole-N pole-S
pole shape.
[0052] The weight (320) serves to improve vibrating force of the
trembler (300) and to fix the magnet (310). The weight (320) takes
the shape of a frame having an opening for fixing the magnet
(310).
[0053] The yoke (330) includes mutually opposite lateral plates
(334) each extended to a same direction from an upper plate (332)
and both edges opposite to the upper plate (332). The mutually
opposite pair of lateral plates (334) respectively faces the first
and second elastic units (120, 130) integrally formed with the
bottom case (100). The yoke (330) functions to inhibit the magnetic
flux generated from the magnet from leaking to further enhance a
vibration characteristic of the trembler (300).
[0054] In the first embodiment of the present disclosure, the first
and second elastic units (120, 130) integrally formed with the
bottom case (100) is coupled to the trembler (300).
[0055] In order to vibrate the trembler (300), the first and second
elastic units (120, 130) are discrete each at a predetermined space
(G) as shown in FIG. 4, and the trembler (300) is formed with a
width (W) narrower than the discrete space (G) between the first
and second elastic units (120, 130).
[0056] In the first embodiment of the present disclosure, in a case
the trembler (300) does not include the yoke (330), the weight
(320) of the trembler (300) is coupled to the first and second
elastic units (120, 130). Meanwhile, in a case the trembler (300)
includes the yoke (330), the first and second elastic units (120,
130) are coupled to the lateral plate (334) of the yoke (330).
[0057] In the first embodiment of the present disclosure, the
trembler (300) and the first and second elastic units (120, 130)
may be mutually coupled by a welding method such as spot welding
method. The second spring unit (124b) among the first, second and
third spring units (124a, 124b, 124c) constituting the first
elastic unit (120) may be welded to any one lateral plates (334) of
the yoke (330) at the trembler (300).
[0058] Furthermore, the fifth spring unit (134b) in the fourth,
fifth and sixth spring units (134a, 134b, 134c) constituting the
second elastic unit (130) may be welded to remaining one lateral
plates (334) of the yoke (330) at the trembler (300).
[0059] In the first embodiment of the present disclosure, due to
the fact that the space between the first and second elastic units
(120, 130) is smaller than the width of the yoke at the trembler
(300), the second spring unit (124b) of the first elastic unit
(120) is brought into close contact with the lateral plate (334) of
the yoke (330), where the first and third spring units (124a, 124c)
are distanced from the lateral plate (334) of the yoke (330).
[0060] Furthermore, due to the fact that the space between the
first and second elastic units (120, 130) is smaller than the width
of the yoke at the trembler (300), the fifth spring unit (134b) of
the second elastic unit (130) is brought into close contact with
the lateral plate (334) of the yoke (330), where the fourth and
sixth spring units (134a, 134c) are distanced from the lateral
plate (334) of the yoke (330).
[0061] The upper case (400) takes the shape of a bottom-opened
cylinder, and is coupled to the bottom case (100), where an
accommodation space formed by the upper case (400) and the bottom
case (100) is accommodated by the stator (200) and the trembler
(300).
[0062] FIGS. 6 and 7 are perspective views illustrating a trembling
process of a trembler by a first elastic unit according to a first
exemplary embodiment of the present disclosure.
[0063] Referring to FIGS. 1 and 6, in a case the coil block (220)
is applied with a current to generate a magnetic field from the
coil block (220), the trembler (300) is applied with an attractive
force and a repulsive force generated by a magnetic field generated
by the coil block (220) and a magnetic field generated by the
magnet (310), and the trembler (300) moves to a first direction
(FD) facing the first elastic unit (120) by the attractive and
repulsive forces.
[0064] The second spring unit (122b) of the first elastic unit
(120) receives a compression force in response to movement of the
trembler (300), and the trembler (300) receives a maximum
compression force when the trembler (300) maximally moves to the
first direction (FD), as shown in FIG. 7. All the first, second and
third spring units (122a, 122b, 122c) of the first elastic unit
(120) are substantially aligned on a same planar surface when the
trembler (300) is maximally moved to the first direction (FD).
[0065] Thereafter, in a case the coil block (200) is interrupted
with a current or the coil block (200) is applied with a reverse
current, a force for moving the trembler (300) to the first
direction (FD) is removed, whereby the trembler (300) is moved to a
second direction (SD), which is a reverse direction of the first
direction (FD), by the compression force of the first elastic unit
(120). These processes are repeated to allow the trembler (300) to
horizontally move on the coil block (200).
Second Exemplary Embodiment
[0066] FIG. 8 is a cross-sectional view illustrating a linear
vibrator according to a second exemplary embodiment of the present
disclosure.
[0067] A linear vibrator illustrated in FIG. 8 is substantially
same as that of the linear vibrator illustrated in FIGS. 1 to 7
except for positions of the first and second elastic units. Thus,
redundant description as that of FIGS. 1 to 7 will be omitted, and
if considered appropriate, reference numerals have been repeated
among the figures to indicate corresponding and/or analogous
elements.
[0068] Referring to FIG. 8, a linear vibrator (600) includes a
bottom case (100), a stator (200), a trembler (300) and an upper
case (400) including first and second elastic units (430, 440).
[0069] The upper case (400) includes an upper plate (410), a
lateral surface plate (420), and first and second elastic units
(430, 440).
[0070] In a non-limiting example, the upper plate (410) takes the
shape of a rectangular plate, and the lateral surface plate (420)
is extended to the bottom case (100) from both edges of the upper
plate (410) parallel with a vibration direction (VD) of the
trembler (300), and coupled to the bottom case (100).
[0071] The first and second elastic units (430, 440) are
perpendicularly formed on the upper plate (410) relative to each
lateral surface plate (420), where the first elastic unit (430)
faces the second elastic unit (440).
[0072] The first elastic unit (430) includes a first spring unit
(432), a second spring unit (434) connected to the first spring
unit (432), and a third spring unit (436) connected to the second
spring unit (434), where the first, second and third spring units
(432, 434, 436) are arranged in parallel.
[0073] The first spring unit (432) is integrally formed with any
one of first fixtures (431a) integrally formed with the upper plate
(410), and the third spring unit (436) is integrally formed with a
remaining first fixture (431b) integrally formed with the upper
plate (410). The second spring unit (434) is secured to a lateral
surface of the trembler (300) by way of welding.
[0074] The second (430) includes a fourth spring unit (442), a
fifth spring unit (444) connected to the fourth spring unit (442),
and a sixth spring unit (446) connected to the fourth spring unit
(442), where the fourth, fifth and sixth units (442, 444, 446) are
arranged in parallel.
[0075] The fourth spring unit (442) is integrally formed with any
one of second fixtures (441a) integrally formed with the upper
plate (410), and the sixth spring unit (446) is integrally formed
with a remaining second fixture (441b) integrally formed with the
upper plate (410). The fifth spring unit (444) is secured to the
other lateral surface opposite to the one lateral surface of the
trembler (300) by way of welding.
[0076] Meanwhile, in a case the first and second elastic units
(430, 440) are exposed to the upper case (400), there is a risk of
the first and second elastic units (430, 440) being damaged, such
that the bottom case (100) may be formed with a protective plate
(170) covering the first and second elastic units (430, 440) of the
upper case (400).
[0077] As apparent from the foregoing, the linear vibrator
according to the exemplary embodiments of the present disclosure
has an industrial applicability in that first and second elastic
units are bent from a bottom case or an upper case, and first and
second elastic units are respectively coupled to both lateral sides
of a trembler to allow the trembler of the linear vibrator to
vibrate to a horizontal direction relative to a coil block, whereby
thickness of the linear vibrator is reduced, and a superficial area
of the linear vibrator is also reduced by the first and second
elastic units to effectively manufacture the linear vibrator in a
further compact style.
[0078] The above-mentioned linear vibrator according to the present
disclosure may, however, be embodied in many different forms and
should not be construed as limited to the embodiments set forth
herein. Thus, it is intended that embodiments of the present
disclosure may cover the modifications and variations of this
disclosure provided they come within the scope of the appended
claims and their equivalents.
[0079] While particular features or aspects may have been disclosed
with respect to several embodiments, such features or aspects may
be selectively combined with one or more other features and/or
aspects of other embodiments as may be desired.
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